Oxygen-generating composition.



UNITED s rnrns OF JENA, GERMANY, ASSIGNOR TO THE FIRM OF CARL ZEISS, OF JENA,'GERMANY.

MORDKO HERSCHKOWITSCH,

Parana ora ion.

OXYGEN-GENERATING COMPOSITION.

No Drawing.

, Specification of Letters Patent.

To all whom "it may concern:

Be it known that I, MORDKO HnRscH- KOWITSCH, a citizen of the German Empire, residing atCarl-Zeiss strasse, Jena, in the Grand Duchy of SaXe-Weimar, Germany, have invented a new and useful Oxygen Generating Composition, of which the fol lowing is a specification.

The invention relates to an improvement in compositions, which-generateoxygen when plying heat to the principal ingredient, one

of them at least being an ox-idable substance.

Compositions of this kind are disclosed in the Patent 874,596 and may be technically utilized in accordance with this patent.

The object of the invention is to lower the temperature of decomposition of the principal ingredient considerably below its temperature of fusion. Such lowering becomes l t l l l possible, when there is included among the secondary ingredients a small quantity of a substance, which decomposes when heated, before the temperature of fusion of the principal ingredient is reached, and which gener-' ates a gas during its decomposition. This gas then acts as a powerful catalyte upon the principal ingredient of the composition;

' To the substances having the property indicated above belong certain metallic salts, e. r oxalates, those of iron, of nickel and of zinc, also carbonates of nickel, copper and iron. Carbonates form, as is well-known, as a gaseous product of decomposition carbon dioxid, oxalates form in addition to this also carbonic oxid.

A composition according to the present invention with the use of oxalate of iron 10 h (i Powdered iron- 5 10 Oxalate of iron a 2 Peroxid of iron (manganese dioxid) can 5 be entirely dispensed with, if the quantity of oxalate be increased, say' doubled. Similarly with the use of carbonate of nickel, even without peroxid of iron, a useful composition is obtained, 6. g. by using the following ingredients Potassium chlorate -75 to 90 parts by weight.

Powdered iron 5 10 5 Carbonate ofnickel- 2 5 I claim:

1. Composition generating oxygen when salt, which when heated liberates free oxygen and a number of secondary ingredients suitable to continue the decomposition of the said salt, after this decomposition has been started by local heating, ,among the said secondary ingredients being at least, one oxvidable substance and a small quantity of a metallic .salt, which decomposes, generatm gas, when heated to near the temperat-ure'o fusion of the said oxygenated salt.

2. Composition generating oxygen. when heated, consisting of a highly oxygenated salt, which when heated liberates free oxysuitable to continue the decomposition of th .said salt, after this decomposition has been started by local heating, among the sad secondary ingredients being at least one 0xidable substance and a small quantlty of an oxalate.

MORDKO HERSCHKOWITSCH. Witnesses:

PAUL Knt'renn,

ALFRED MACKEDANZ;

Patented May 21, 1912;. Application filed Ju1y 20, 1910. Serial No. 572,942.

heated, consisting of a highly oxygenated.

gen and a number of secondary ingredients I 

